Exercising platform



FIG. 1 is a top plan view of an exercising platform showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is an enlarged top plan view thereof shown partially in fragment; and

FIG. 5 is an enlarged bottom plan view thereof shown partially in fragment. 

The ornamental design for an exercising platform, as shown and described. 